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Characterization and quantification of middle Miocene reservoirs of starfak and tiger shoal fields, offshore Louisiana, using genetic sequence stratigraphy and neural-networksKılıç, Cem Okan. Fisher, W. L. January 2004 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: William L. Fisher. Vita. Includes bibliographical references.
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Reservoir characterization of the Miocene Starfak and Tiger Shoal fields, offshore Louisiana through integration of sequence stratigraphy, 3-D seismic, and well-log data /Badescu, Adrian Constantin. January 2002 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2002. / Includes bibliographical references. Also available in an electronic version.
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Miospore Biostratigraphy, Sequence Stratigraphy, and Glacio-Eustatic Response of the Borden Delta (Osagean; Tournaisian/Visean) of Kentucky and Indiana, U.S.ARichardson, Jeffery G. 02 April 2003 (has links)
No description available.
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Sedimentology, ichnology, and sequence stratigraphy of the Middle-Upper Eocene succession in the Fayum Depression, EgyptAbdel-Fattah, Zaki Ali 11 1900 (has links)
Middle-Upper Eocene successions were studied in the Fayum Depression in order to establish depositional and paleoenvironmental models that link the ichnological and sedimentologic data to relative sea-level changes in a sequence stratigraphic framework. Five facies associations (FA1- FA5) are identified. The facies depositional models show overall progradation from quiescent open-marine bay (FA1-2: Gehannam and Birket Qarun formations) to lagoon/distributary channel/estuary sedimentary environments (FA3-5: Qasr El-Sagha Formation). The facies successions and their stratigraphic evolution are controlled by a regional, second-order cycle associated with the northward regression of the Tethys, which is overprinted by subordinate third- and higher-order cycles.
Whale-bearing FA1 and FA2 are subdivided into five sedimentary facies. Seventeen ichnospecies belonging to thirteen ichnogenera, as well as rhizoliths are observed within these facies. Facies Association 1 accumulated in a low-energy fullymarine bay, whereas FA 2 represents a bay margin / supratidal paleoenvironments. Clastic point-sources are dominantly hypopycnal although eolian sand may represent an important source locally. The quiescent marine bay is a typical environment and biome for the Eocene whales. Preservation of these fossil whales must occur in association with rapid sedimentation rates, but sufficiently that bioturbation eradicates the physical
sedimentary structures.
Unusual, large-sized sedimentary structures are examined along the parasequence-bounding surfaces of the Birket Qarun Sandstone. Ichnological data, petrography and stable-isotope analysis are integrated to propose a bio-sedimentologic/diagenetic model, interpreting the origin of these structures as concretion growths around ichnofossils. The marine pore-water carbon was influenced by organic carbon and mixing of meteoric groundwater under eodiagenetic conditions. These conditions led to the precipitation of pervasive authigenic calcite-dominated cement in and around the burrows.
More than twenty-five Glossifungites Ichnofaciesdemarcated discontinuities are examined in the study area. These surfaces are grouped into those of autocyclic and those of allocyclic origin. Occurrences of the allocyclically significant Glossifungites Ichnofacies can be classified into sequence-bounding, systems tract-bounding and parasequence-bounding surfaces. Sequence-bounding Glossifungites Ichnofacies-demarcated surfaces divide the studied successions into four third-order sequences. Systems tract-bounding and parasequence-bounding Glossifungites Ichnofacies-demarcated surfaces display higher-order cycles, overprinting the third-order cycles.
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Correlation between High Resolution Sequence Stratigraphy and Mechanical Stratigraphy for Enhanced Fracture Characteristic PredictionAl Kharusi, Laiyyan Mohammed 18 December 2009 (has links)
Sequence stratigraphy relates changes in vertical and lateral facies distribution to relative changes in sea level. These relative changes in carbonates effect early diagenesis, types of pores, cementation and dissolution patterns. As a result, in carbonates, relative changes in sea level significantly impact the lithology, porosity, diagenesis, bed and bounding surfaces which are all factors that control fracture patterns. This study explores these relationships by integrating stratigraphy with fracture analysis and petrophysical properties. A special focus is given to the relationship between mechanical boundaries and sequence stratigraphic boundaries in three different settings: 1) Mississippian strata in Sheep Mountain Anticline, Wyoming, 2) Mississippian limestones in St. Louis, Missouri, and 3) Pennsylvanian limestones intermixed with clastics in the Paradox Basin, Utah. The analysis of these sections demonstrate that a fracture hierarchy exists in relation to the sequence stratigraphic hierarchy. The majority of fractures (80%) terminate at genetic unit boundaries or the internal flooding surface that separates the transgressive from regressive hemicycle. Fractures (20%) that do not terminate at genetic unit boundaries or their internal flooding surface terminate at lower order sequence stratigraphic boundaries or their internal flooding surfaces. Secondly, the fracture spacing relates well to bed thickness in mechanical units no greater than 0.5m in thickness but with increasing bed thickness a scatter from the linear trend is observed. In the Paradox Basin the influence of strain on fracture density is illustrated by two sections measured in different strain regimes. The folded strata at Raplee Anticline has higher fracture densities than the flat-lying beds at the Honaker Trail. Cemented low porosity rocks in the Paradox Basin do not show a correlation between fracture pattern and porosity. However velocity and rock stiffness moduli's display a slight correlation to fracture spacing. Furthermore, bed thickness is found to be only one factor in determining fracture density but with increasing strain, internal bedforms and rock petrophysical heterogeneities influence fracture density patterns. This study illustrates how integrating sedimentologic and sequence stratigraphic interpretations with data on structural kinematics can lead to refined predictive understanding of fracture attributes.
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Sedimentology, ichnology and sequence stratigraphy of the Lower Cambrian Gog Group, southern Rocky Mountains, CanadaDesjardins, Patricio Rafael 06 April 2011
<p>The architecture, distribution and facies of sandstone bodies in the Gog Group of the southern Rocky Mountains of western Canada record the dynamics of sand movement on the broad continental shelf of West Laurentia during the Early Cambrian phase of worldwide transgression. This study focuses on the stratigraphy, sedimentology and ichnology in the Bow Valley region, specifically the sector from Mount Assiniboine northwest to the North Saskatchewan River. The objectives of this project were several-fold: (1) revise the existing stratigraphic nomenclature; (2) document the sedimentary facies; (3) identify facies assemblages and interpret them in terms of sedimentary processes and environments; (4) characterize sandstone body geometries; (5) develop a sequence-stratigraphic framework; (6) document trace-fossil occurrences; and (7) characterize different trace-fossil assemblages in terms of colonization trends and prevailing paleoenvironmental conditions.</p>
<p>The Gog Group in this area has historically comprised four units, the Fort Mountain, Lake Louise, St. Piran and Peyto formations. North of Bow Pass an additional unit, the Jasper Formation, occurs below the Fort Mountain Formation and is related to accommodation created by active rift-faulting during the latest Neoproterozoic. In the Lake Louise and Lake O'Hara area, four new formal subdivisions within the St. Piran Formation are proposed: Lake O'Hara, Lake Oesa, Lake Moraine and Wiwaxy Peaks members.</p>
<p>The sequence stratigraphy of tide-dominated setting has yet not been fully explored. The stratal architecture of the Lake O'Hara and Lake Oesa members reveals a new mechanism for the formation of the regressive surface of marine erosion landward of the lever point of balance between sedimentation and erosion in the subtidal environment. As the shoreline is forced to regress with falling sea level, the laterally continuous tidal flats advance and the preexisting shallow-subtidal compound dunes are scoured by strong tidal currents that carve gradually a new equilibrium profile. We argue that the accretion of intertidal flats on top of subtidal sands is an overlooked yet predictable component of falling-stage systems tracts in tide-dominated settings.</p>
<p>The Gog Group also offers an opportunity to explore animal-sediment relationships in a high-energy setting, during the early phase of Phanerozoic diversification. The presence of constrasting ichnofabrics within a single Early Cambrian sand-sheet complex illuminates how the colonisation trends of suspension and detritus feeders were controlled by factors specific to the various subenvironments.<p>
<p>The variety of sandbody types in the Gog Group reflects varying sediment supply and location on the inner continental shelf. Five types of compound cross-stratified sandstone are distinguished based on foreset geometry, sedimentary structures and internal heterogeneity. These represent five broad categories of subtidal sandbodies: (1) compound-dune fields; (2) sand sheets; (3) sand ridges; and (4) patchy dunes. Trace-fossil distribution in these tide-dominated sand bodies and adjacent sediments is mostly controlled by an interplay of substrate mobility, grain size, turbidity, water-column productivity, and sediment organic matter. Salinity is a critical factor in marginal-marine locations but played no role in this region of the shelf.</p>
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Sequence Stratigraphy of the Cenozoic Pannonian Basin, HungaryJanuary 1997 (has links)
The sequence stratigraphy of the middle Eocene-Pliocene of the Pannonian
Basin permits to differentiate fifty-nine depositional sequences.
An earlier compressional Paleogene basin in the central and eastern
Pannonian Basin is unconformably overlain by a Neogene extensional basin.
Tectonic regimes interacted with transgressive-regressive facies cycles. The
boundaries of these cycles coincide with regional stage boundaries.
Unconformities separating these cycles mark the episodic closure of connections
between the Pannonian Basin and the European epicontinental seas from
Oligocene through middle Miocene time. The unconformities are the result of
short-term glacio-eustatic falls, sometimes enhanced by tectonic events.
Within the limits of biostratigraphic resolution during the Eocene-middle
Miocene, many of the sequences of the Pannonian Basin correlate well with the
sequences proposed by Haq et al. (1987). However, eight sequences, i.e. one in
the Lutetian, three in the Bartonian, one in the Priabonian, one in the Rupelian
and two in the Burdigalian, were not identified by Haq et al. (1987).
The sequences and their boundaries are directly correlated with global
oxygen isotope events. Glacioeustasy generates sequence boundaries beginning
as early as the middle Eocene.
Within the lacustrine setting of the Pannonian Basin (late Miocene-
Pliocene time) relative lake level changes appear to control the overall sequence
development. However, other minor variables, the sediment supply and the
topography of the initial depositional surface were additional controlling factors.
Thus differences in the physiography of the basin lead to totally different
sequence types that all reflect to lake level fluctuations. In lateral direction,
during a short time period, these lacustrine sequences are more sensitive to
changes in the initial depositional profile and sediment supply. / pages 390 and 396 are missing from text.
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Sedimentology, ichnology and sequence stratigraphy of the Lower Cambrian Gog Group, southern Rocky Mountains, CanadaDesjardins, Patricio Rafael 06 April 2011 (has links)
<p>The architecture, distribution and facies of sandstone bodies in the Gog Group of the southern Rocky Mountains of western Canada record the dynamics of sand movement on the broad continental shelf of West Laurentia during the Early Cambrian phase of worldwide transgression. This study focuses on the stratigraphy, sedimentology and ichnology in the Bow Valley region, specifically the sector from Mount Assiniboine northwest to the North Saskatchewan River. The objectives of this project were several-fold: (1) revise the existing stratigraphic nomenclature; (2) document the sedimentary facies; (3) identify facies assemblages and interpret them in terms of sedimentary processes and environments; (4) characterize sandstone body geometries; (5) develop a sequence-stratigraphic framework; (6) document trace-fossil occurrences; and (7) characterize different trace-fossil assemblages in terms of colonization trends and prevailing paleoenvironmental conditions.</p>
<p>The Gog Group in this area has historically comprised four units, the Fort Mountain, Lake Louise, St. Piran and Peyto formations. North of Bow Pass an additional unit, the Jasper Formation, occurs below the Fort Mountain Formation and is related to accommodation created by active rift-faulting during the latest Neoproterozoic. In the Lake Louise and Lake O'Hara area, four new formal subdivisions within the St. Piran Formation are proposed: Lake O'Hara, Lake Oesa, Lake Moraine and Wiwaxy Peaks members.</p>
<p>The sequence stratigraphy of tide-dominated setting has yet not been fully explored. The stratal architecture of the Lake O'Hara and Lake Oesa members reveals a new mechanism for the formation of the regressive surface of marine erosion landward of the lever point of balance between sedimentation and erosion in the subtidal environment. As the shoreline is forced to regress with falling sea level, the laterally continuous tidal flats advance and the preexisting shallow-subtidal compound dunes are scoured by strong tidal currents that carve gradually a new equilibrium profile. We argue that the accretion of intertidal flats on top of subtidal sands is an overlooked yet predictable component of falling-stage systems tracts in tide-dominated settings.</p>
<p>The Gog Group also offers an opportunity to explore animal-sediment relationships in a high-energy setting, during the early phase of Phanerozoic diversification. The presence of constrasting ichnofabrics within a single Early Cambrian sand-sheet complex illuminates how the colonisation trends of suspension and detritus feeders were controlled by factors specific to the various subenvironments.<p>
<p>The variety of sandbody types in the Gog Group reflects varying sediment supply and location on the inner continental shelf. Five types of compound cross-stratified sandstone are distinguished based on foreset geometry, sedimentary structures and internal heterogeneity. These represent five broad categories of subtidal sandbodies: (1) compound-dune fields; (2) sand sheets; (3) sand ridges; and (4) patchy dunes. Trace-fossil distribution in these tide-dominated sand bodies and adjacent sediments is mostly controlled by an interplay of substrate mobility, grain size, turbidity, water-column productivity, and sediment organic matter. Salinity is a critical factor in marginal-marine locations but played no role in this region of the shelf.</p>
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Three-dimensional fluvial-deltaic sequence stratigraphy Pliocene-Recent Muda Formation, Belida Field, West Natuna Basin, IndonesiaDarmadi, Yan 25 April 2007 (has links)
The Pliocene-Recent Muda formation is essentially undeformed in the West
Natuna Basin, and excellent resolution of this interval on three-dimensional seismic data
in Belida Field allows detailed interpretation of component fluvial-deltaic systems.
Detailed interpretation of seismic time slice and seismic sections along with seismic
facies analysis, horizon mapping, and extraction of seismic attributes provide the basis to
construct a sequence stratigraphic framework and determine patterns for sediment
dispersal and accumulation.
The Muda interval contains five third-order sequences, with depositional
environments confined to the shelf and consisting mainly of fluvial elements. Sequence
boundaries (SB) apparently result from major sea level falls, since there was no tectonic
uplift and the field underwent only regional slow subsidence during sedimentation of the
study interval.
Sea level fluctuation also caused changes in fluvial patterns. Analysis of
changing channel patterns indicates that major systems tracts relate to specific channel
patterns. The Lowstand Systems Tract (LST) is generally dominated by larger channel dimensions and low sinuosity channel patterns. The Transgressive Systems Tract (TST)
typically contains relatively smaller channels with high sinuosity. Channels in the
Highstand Systems Tract (HST) generally show moderate sinuosity channels and are
intermediate in size, larger than TST channels but smaller than LST channels. Crossplots
of stratigraphic position and channel morphology indicate that within the transition from
LST-TST, channel dimensions (width and thickness) generally decrease and channel
sinuosity generally increases.
High sinuosity, meandering and anastomosing channels are generally found near
the maximum flooding surface. Low sinuosity channels occur within the HST-SB-LST
succession, with the exception of higher sinuosity meandering channels evolving inside
valleys. Larger, lower sinuosity channels result from high gradient and high discharge
associated with stream piracy. Smaller, high-sinuosity channels result from low gradient
and small discharge.
Extraction of seismic attributes such as RMS Amplitude and Average Reflection
Strength show these depositional features in greater detail. In the Belida Field area,
lowstand channels were found to comprise the greatest volume of sandstone bodies.
Seismic delineation of the distribution and morphology of these channel systems provides
critical input for reservoir modeling and volumetric analysis.
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Sequence stratigraphy and depositional history of the upper Cañon del Tule, Las Imagenes, and Lower Cerro Grande Formations, central Parras Basin, northeastern MexicoBermúdez Santana, Juan Clemente 28 August 2008 (has links)
Not available / text
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